EP2384669B1 - Sleep system - Google Patents

Description

The invention relates to a sleep system with a Aufliegematratze and a lower mattress, with an adjustment, wherein the Aufliegematratze or the lower mattress has a motor adjustment. Such sleep systems are already known. They have proven themselves because they can be adapted to different usage situations, such as sleeping, reading or watching TV.

From the JP 2005028000 A a foldable engine frame is known. This can be actuated by means of an electrical expansion and contraction device.

A disadvantage of such sleep systems is that they are usually bulky, so difficult to transport and stow and consuming in the production.

The invention has set itself the task of creating such a sleep system that does not have these disadvantages or to a lesser extent. This object is achieved by the reproduced in claim 1 sleep system.

The sleep system according to the invention comprises a Aufliegematratze and a lower mattress and an adjustment. The Aufliegematratze or the lower mattress has a motor adjustment. The motorized adjusting device includes at least one adjustable segment. The Aufliegematratze or the lower mattress, which has the motor adjustment, is hinged or divisible. So if the Aufliegematratze has the motor adjustment, then this is foldable or divisible. In contrast, if the lower mattress has the motor adjustment, then this is foldable or divisible. The sleep system according to the invention has the particular comfort of an adjustable mattress and can still be stored or transported to save space.

Among other things, a particularly comfortable use may result if the Aufliegematratze or the lower mattress, which has the motor adjustment, foldable and not divisible.

Preferably, the Aufliegematratze or the lower mattress, which has the motor adjusting device, about a single axis hinged. As a result, a prerequisite is created that already results in a significant space savings, with low production costs and ease of use.

In the particularly preferred embodiment, the Aufliegematratze or the lower mattress, which has the motor adjustment, based on their length in the middle folds. The Aufliegematratze or the lower mattress, which has the motor adjustment, so it is hinged so that its length is halved by the flaps.

A further reduction of the production costs and thus the possibility to offer the mattress inexpensively arise when the Aufliegematratze or the lower mattress, which has the motor adjusting device, having a range with motor adjustment and a range without motor adjustment. It has been found that there are areas of the mattress in which a motor adjustment is extremely advantageous and other areas where can be dispensed with without much loss of comfort on such adjustment.

Preferably, the area without motor adjustment device makes at least one third of the Aufliegematratze or the lower mattress, which has the motor adjustment, more preferably about half of the Aufliegematratze or the lower mattress, which has the motor adjustment, from.

Preferably, the adjustment range of the Aufliegematratze or the lower mattress, which has the motor adjustment device, the area over which comes in proper use of the upper body of the user comes to rest.

Preferably, a hinged or separable area, more preferably a hinged or separable half of the Aufliegematratze or the lower mattress, which has the motor adjustment, completely formed as a range without motor adjustment. As a result, the foldability or separability can be realized simply and reliably, since, for example, no electrical lines have to be made foldable or separable. In addition, the manufacturing cost can be reduced because a mattress half of the Aufliegematratze or the lower mattress, which has the motor adjustment, can be produced completely in a conventional manner.

In one embodiment, the motorized adjustment device has at least two adjustable segments, preferably directly connected to one another. Opposite adjustable mattresses, in which the adjusting device does not have at least two directly connected adjustable segments, so for example a mattress with adjustable head and / or foot, which is not further segmented in itself and is connected to a non-adjustable middle part, is a special Comfort given. Because by at least two directly interconnected adjustable segments are provided, different inclinations can be realized within the adjustment. For example, a back portion may be adjusted so that a segment of a first slope joins another (header) segment of greater pitch.

In the preferred embodiment, the motorized adjustment device is integrated in the abutment mattress or undermattress having the motorized adjustment device. This makes handling easier and ensures an attractive, clear appearance.

If the motor adjusting device is provided exclusively in lateral areas of the Aufliegematratze or the lower mattress, which has the motor adjustment, then a prerequisite for a particularly simple yet comfortable construction of the Aufliegematratze or the lower mattress, which has the motor adjustment, given.

No element is provided which, when the adjustment range is adjusted, projects out of a plane defined by the support mattress or undermattress comprising the motorized adjustment device in the adjustment region and the adjustment region of the support mattress or undermattress comprising the motor adjustment device , supports or guides against the ground. Thus, it is preferable that the adjustable segments, and more preferably the non-adjustable region of the Aufliegemratratze or the lower mattress, which has the motor adjustment, dimensioned and preferably so positioned and particularly preferably in such a way connected to each other that the Aufliegematratze or the lower mattress, the motorized adjustment is in proper use in any adjustment position without special external force or fixation in a stable state. In this way it is prevented without elaborate Fixierungsvorkehrungen or support or guide elements that the Aufliegematratze or the lower mattress, which has the motor adjusting device threatens to tip over, for example in a suitable for reading adjustment position to the rear. The dispensability of Fixierungsvorkehrungen or support or guide elements a variety of usability is guaranteed. For example, the sleep system or the Aufliegematratze or the lower mattress, which has the motor adjustment, placed directly and at any point on the floor and used there. The sleep system or the Aufliegematratze or the lower mattress, which has the motor adjustment, so can be used, for example, to sleep in one place of a room and be moved to the television with little effort.

It is in the preferred embodiment, no base, for example, bed frame, provided, on which the Aufliegematratze or the lower mattress, which has the motor adjustment, supported. This can have a very positive effect on the required production effort, as well as the storage and transport of the sleep system.

In a particularly important embodiment, the lower mattress on the motor adjusting device.

In the most preferred embodiment, the sub-mattress comprises a base plate. This creates a prerequisite for a surprisingly simple and yet comfortable construction of the sleep system.

The base plate is preferably subdivided into a plurality of segments, which are preferably connected to one another in an articulated manner, more preferably by means of material hinges. The base plate of this kind can assume a plurality of functions. On the one hand, it can replace laths, especially in the adjustment range. On the other hand, it can contribute to stabilizing the overall structure and receiving and distributing the occurring in particular in the adjusted state of the mattress forces that the mattress without underframe or support or guide element manages. The fabric hinges also have several advantages. On the one hand, they can be produced with little manufacturing effort. On the other hand, they hardly bear, so they are space-saving and reliable. If they are elastic, then it is ensured in a very simple way that they length changes during the folding and / or adjustment, which then arise when the folding and / or adjustment axis, as preferred, are not in the plane of the hinges , tolerate. The fabric hinges are preferably glued, particularly preferably directly on the segments of the base plate. In one embodiment, the fabric hinges are designed as a pleat tape to tolerate the change in length.

The segments of the base plate are preferably solid and more preferably parallelepipedic. They preferably have no openings except for air holes. Preferably, no recesses are provided. As a result, a special robustness, given at extremely low production cost of the base plate. The base plate may include wood or plastic. Preferably, it is a medium density fiberboard (MDF board).

The motor adjusting device is preferably arranged completely over the base plate. It is therefore arranged on the user-facing side of the base plate. This results in a simple structure and a flat underside of the lower mattress. It has been found that, despite this structure, a comfortable base mattress can be created in which the motorized adjusting device is not pushed through and is uncomfortable to the user as unevenness.

Preferably, the sub-mattress comprises a layer of foam provided over the base plate.

Preferably, the layer of foam is divided into several segments. As a result, the layer of foam can join the adjustment of the lower mattress without generating a resistance.

The height of the layer of foam preferably corresponds at least approximately to the height of the motor adjusting device. This results in a compact construction of the lower mattress.

The layer of foam preferably has at least one complementary to the dimensions of the motor adjusting recess. As a result, as preferred, the motor adjusting device can be arranged in the recesses of the layer of foam.

When the sub-mattress, as is preferred, comprises a casing which encloses the remaining elements of the sub-mattress, the result is a pleasing, uniform appearance of the sub-mattress and easy handling. In addition, the motor adjustment is protected from dirt, such as dust. The sheath is preferably made of fabric and more preferably provided very elastic to tolerate changes in length, in particular during the folding process.

On the lower mattress, an ordinary Aufliegematratze is preferably arranged.

If the sub-mattress, as preferred, is at least partially connected to the usual Aufliegematratze, then can be dispensed with a bed frame or the like to prevent slippage of the ordinary Aufliegemratratze on the lower mattress.

Preferably, the lower mattress is not connected to the usual Aufliegematratze in the adjustment. By thus a movement in the adjustment range between the invention and the usual mattress base mattress is possible, the ordinary Aufliegematratze must not be compressed during the adjustment in a more upright position, whereby it opposes the adjustment of a lower resistance.

Preferably, the usual Aufliegematratze includes an ordinary Aufliege - Rollmatratze.

In a further embodiment, the Aufliegematratze and not the lower mattress on the motor adjustment device.

The motor adjusting device of the Aufliegematratze invention may also have transverse slats. The adjustment range of the Aufliegematratze can therefore be considered in this embodiment as a combination mattress area, ie area in which the lower mattress is integrated into the Aufliegematratze. Such a Aufliegematratze can be used as a conventional Aufliegematratze be placed so for example on a conventional mattress. It is also suitable for use without a conventional mattress, since essential areas of the mattress are already supported by crossbars.

The motorized adjustment device may be at least partially configured such as motorized adjustment devices such as those offered by Westmont (e.g., Easy Move or DriveTec).

The invention also relates to a lower mattress with the above features, as well as a Aufliegematratze with the above features.

Fig. 1

eine Seitenansicht einer Untermatratze mit motorischer Verstellvorrichtung eines erfindungsgemäßen Schlafsystems;

Fig. 2

eine Ansicht wie in Fig. 1 in zusammengeklapptem Zustand;

Fig. 3

eine Seitenansicht einer Aufliegematratze mit motorischer Verstellvorrichtung eines erfindungsgemäßen Schlafsystems in einer beispielsweise zum Schlafen geeigneten Einstellung;

Fig. 4

eine Ansicht wie in Fig. 3 einer beispielsweise zum Lesen geeigneten Einstellung;

Fig. 5

eine Ansicht einer Aufliegematratze mit motorischer Verstellvorrichtung eines erfindungsgemäßen Schlafsystems, bei der der Verstellbereich und der Stützbereich auf dem Bereich ohne motorische Verstellvorrichtung abgelegt ist;

Fig. 6

eine Ansicht von oben auf eine Aufliegematratze mit motorischer Verstellvorrichtung eines erfindungsgemäßen Schlafsystems;

Fig. 7

eine perspektivische Darstellung eines erfindungsgemäßen Schlafsystems mit einer Untermatratze mit motorischer Verstellvorrichtung in einer weiteren Ausführungsform, auf der eine gewöhnliche Matratze angeordnet ist.

The invention will now be explained in more detail with reference to embodiments shown in the drawings. They show schematically:

Fig. 1

a side view of a mattress with motor adjustment of a sleep system according to the invention;

Fig. 2

a view like in Fig. 1 in the folded state;

Fig. 3

a side view of a Aufliegematratze with motor adjustment of a sleep system according to the invention in a suitable example for sleeping setting;

Fig. 4

a view like in Fig. 3 a setting suitable for reading, for example;

Fig. 5

a view of a Aufliegematratze with motor adjustment of a sleep system according to the invention, in which the adjustment and the support area is stored on the area without motorized adjustment;

Fig. 6

a view from above of a Aufliegematratze with motor adjustment of a sleep system according to the invention;

Fig. 7

a perspective view of a sleep system according to the invention with a lower mattress with motor adjustment device in a further embodiment, on which an ordinary mattress is arranged.

The Figures 1 and 2 show a first embodiment of a lower mattress 10 of the sleeping system according to the invention designated as a whole by 100, in which the lower mattress 10 has the motorized adjustment device 4. The lower mattress 10 is divided into two areas 1 with 1 a and 3, which are connected by a hinge 6 hinged together. Both areas 1 with 1 a and 3 are approximately equal in size and have approximately half the length of the overall length of the lower mattress 10. Fig. 2 shows the lower mattress 10 in the folded state. To collapse the lower ridge 10, for example, the in Fig. 1 shown right area 3 in the direction of the arrow p2 pivoted about the defined by the hinge 6 folding axis a. The folding process is also indicated by the arrow p3 in FIG Fig. 2 symbolizes. In the folded state, the lower mattress 10 only about half the length of the full length of the lower mattress 10, whereby it is easy to transport and to save space to store. The area 1 is designed as an adjustment range 1, the area 1a as a support area and area 3 as an area without a motor adjustment device 4. The area 3 without motor adjustment device 4 does not differ from a conventional base mattress down to half the length and the attachment of the hinge 6 and can therefore be produced inexpensively. The adjustment area 1 and the support area 1a have a motor adjusting device 4, whose details in the Figures 1 and 2 are not shown in full detail. The motor adjustment device 4 has three segments 2, 2 ', 2a. Each segment 2, 2 ', 2a comprises two opposite short longitudinal bars 4a, 4a', 4a ", of which in the Figures 1 and 2 in each case only one is shown and between the short longitudinal beams 4a, 4a ', 4a "arranged slats 11. Im in the Figures 1 and 2 embodiment shown, the motor adjustment device 4 two hingedly interconnected adjustable segments 2, 2 'and one of these segments 2, 2' hingedly connected base segment 2a. The articulated connection is made by joints 5, 5 '. The motor adjusting device 4 causes a pivoting of the adjustable segment 2 about the hinge 5 and a pivoting of the other adjustable joint 2 'about the joint 5', as indicated by the arrow p1 in Fig. 1 is symbolized. In this way, the adjustment range 1 of the in Fig. 1 shown horizontal position, about to sleep, in a more upright position, about to be brought to reading or watching TV. Since the one adjustable segment 2 may have a different inclination than the further, directly connected to this further adjustable segment 2 ', a special comfort is possible.

The FIGS. 3 to 6 show an embodiment of a Aufliegematratze 9, a sleep system 100 according to the invention, which has a motor adjustment device 4. The Aufliegematratze 9 shown can be used as a conventional Aufliegematratze, so for example be placed on a conventional spring suspension of a bed. The Aufliegematratze 9 is divided into two areas 1 with 1a and 3, which are separably connected. The separable connection can be realized by means of a zipper, approximately encircling, Velcro, magnetic tape or the like. The two areas 1 with 1a and 3 are about the same size and each have about half the length of the length of the entire Aufliegematratze 9. As in Fig. 5 represented, the two areas 1 can be separated with 1a and 3 and placed on each other, resulting in a compact pack size, for transport or for stowage. One of the two areas 3 has no motor adjustment device 4. It does not differ from an area of a conventional Aufliegematratze and is made entirely of foam 8 in the embodiment shown. It is therefore inexpensive to produce, which reduces the manufacturing cost of the entire Aufliegematratze 9. The second region of the Aufliegematzratze 9 is configured as adjustment 1 and 1 a support area. It has a motor adjusting device 4. In particular Fig. 4 shows, the motor adjustment 4 has three short longitudinal beams 4a, 4a ', 4a ", which together with respective opposite longitudinal beams, which in Fig. 4 are not shown Support slats, not shown. The short longitudinal struts 4a, 4a ', 4a "are connected to one another by means of joints 5, 5. The opposite short longitudinal struts, not shown, are also connected to one another by joints which are not shown, resulting in three segments 2, 2', 2a in the adjustment region 1 and support area 1 a, two of which are adjustable Fig. 4 it can be seen, the segments 2, 2 'can be pivoted by means of the motor adjusting device 4 by axes defined by the joints 5, 5' axes of rotation. The adjustment of the 1 Aufliegematratze 9 can therefore, like the FIGS. 3 and 4 show, between a horizontal area, for example, to sleep and an upright area, for example, for reading or watching TV, to be adjusted. Fig. 4 shows a particularly comfortable setting, for example, for reading or watching TV, in which an adjustable segment 2 'has a first inclination and the directly adjustable further adjustable segment 2 has a greater inclination. The motor adjustment device 4 is completely integrated in the adjustment region 1 and the support region 1 a of the Aufliegematratze 9. The adjustment area 1 and the support area 1 a of the Aufliegematratze 9 can therefore be regarded as a combination area of the Aufliegematratze 9, since he the motor adjustment device 4, which, as already mentioned, also includes slats, integrated in itself. Also in the adjustment area 1 and the support portion 1 a of the Aufliegematratze 9 foam 8 'is provided.

In the in the FIGS. 1 to 6 shown embodiments are two directly interconnected segments 2, 2 'independently adjustable by motor. It is conceivable that more than two segments are designed accordingly, ie the adjustment range 1 is segmented even more finely. In addition, it is conceivable that the adjustment of the segments continue to different, but to make each other dependent in a predetermined manner in order to simplify the operation.

Fig. 7 shows an embodiment of a sleep system 100, in which the lower mattress 10, the motor adjustment device 4, 4 'has. The sleep system 100 comes without a base, bed frame or the like on which it is supported out. The lower mattress 10 replaces a conventional mattress (colloquially slatted frame).

The sub-mattress 10 comprises a base plate 12 which is subdivided into three segments 13, 13 ', 13 "The segments 13, 13', 13" are simple, except for introduced, unillustrated air holes, untreated MDF boards of 5 mm thickness, the remaining dimensions of which are governed by the conventional tandem roller mattress 17 arranged on the lower mattress 10 and the size of the support area 1a and the adjustment area 1. The segments 13, 13 ', 13 "are connected to cloth hinges 7, which are glued directly to the segments 13, 13', 13".

Completely and immediately above the base plate 12, the motor adjusting device 4, 4 'is arranged. This comprises a flat drive 4b, 4b 'which is fastened on two segments 13', 13 "of the base plate 12. The flat drive 4b, 4b 'has two elements arranged in each case in a lateral region 15, 15' of the lower mattress 10. On these In any case, the motor adjustment device 4, 4 'can not be felt by a user lying centrally on the sleep system 10. By means of the motorized adjustment device 4, 4', the segment 13 "of the base plate 12 arranged in the head part of the sleep system 100 can move around the adjustment axis b be swung up and down. The segment 13 'of the base plate adjoining this segment is arranged in the region of the buttocks or back of a user and serves as an abutment for the motorized adjusting device 4, 4'. In this embodiment, only a single adjustable segment 2 is provided. It is also conceivable to provide a plurality of adjustable segments 2, 2 '.

Immediately above the base plate 12, a layer 7a made of foam, arranged. It has the same height as the motor adjustment 4, 4 ', namely 8 cm. It is subdivided into segments 8a, 8a ', 8a "which can be glued to the segments 13, 13', 13" of the base plate. The height of the layer 7a of foam corresponds exactly to the height of the motor adjusting device 4, 4 '. The layer 7a made of foam has two to the dimensions of the motor adjusting device 4, 4 'complementary recesses 18, 18' in which the motor Adjustment device 4, 4 'is arranged. To the base plate 12, the layer 7a made of foam and the motor adjustment device 4, 4 'is a highly elastic fabric cover 14 is arranged in Fig. 7 only partially shown. The sub-mattress 10 can be folded around the folding axis a and transported in a carton with relatively small dimensions and stored. The resting on the mattress 10 ordinary Aufliegematratze 16, which is designed as a rolling mattress 17 is connected only in the area 3 without motor adjustment device and in the support area 1a by means of a zipper not shown in the drawing with the lower mattress 10. For transport and storage purposes, the roll mattress 17 can be packed in a second carton.

In all the embodiments shown, the hips and / or the buttocks of the user come to rest above the base segment 2a when used properly. The base segment 2a serves in this way as a support (counterweight) for the adjustable segments 2, 2 '. This contributes to the fact that a fixation of the sleep system 100 is dispensable for the purpose of preventing tipping.

The motor adjusting device 4, 4 'of all embodiments shown comprises an electric motor, not shown in the figures. It can be operated via an input device which can be connected by cable or by radio to the motorized adjustment device 4. The in the Figures 1 and 2 7, as well as 7 according to the invention shown in the mattress 10 and in the FIGS. 3 to 6 shown Aufliegematratze 9 is adjustable in the area over which the user's upper body comes to rest when properly used. As a result, the essential comfort advantage of an adjustable lower or Aufliegematratze is given.

LIST OF REFERENCE NUMBERS

100

sleeping system

1

adjustment

1 a

support area

2, 2 '

adjustable segments

2a

base segment

3

Area without motorized adjusting device

4, 4 '

motorized adjusting device

4a, 4a ', 4a "

short longitudinal spar

4b, 4b '

flat drive

5, 5 '

joints

6

hinge

7, 7 '

fabric hinge

7a

Layer of foam

8, 8 '

foam

8a, 8a ', 8a "

Segments of the foam layer

9

Aufliegematratze

10

under mattress

11

battens

12

baseplate

13, 13 ', 13 "

Segments of the base plate

14

shell

15, 15 '

lateral areas

16

ordinary Aufliegematratze

17

ordinary bed - roll mattress

18, 18 '

recess

a

folding axis

b

adjustment axis

p1

arrow

p2

arrow

p3

arrow

Claims (14)

1. Sleep system (100) having a top mattress (9) and a bottom mattress (10), having an adjustment area (1), the top mattress (9) or the bottom mattress (10) having a motorized adjustment device (4, 4'), the motorized adjustment device (4, 4') including at least one adjustable segment (2, 2'), the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4') being foldable or separable,
   characterized in that
   when the adjustment area (1) is adjusted, no element is provided which projects from a plane which is defined in the adjustment area (1) by the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4'), and with respect to the base surface the plane supports or guides the adjustment area (1) of the top mattress (9) or of the bottom mattress (10) which has the motorized adjustment device (4, 4').
2. Sleep system according to Claim 1, characterized in that the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4') is foldable and nonseparable, the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4') being foldable about a single folding axis (a), wherein
   the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4') is centrally foldable with respect to its length.
3. Sleep system according to Claim 1 or 2, characterized in that the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4') has an area (1, 1 a) with a motorized adjustment device (4, 4') and an area (3) without a motorized adjustment device (4, 4'), wherein
   the area (3) without a motorized adjustment device (4, 4') constitutes approximately one-half of the top mattress (9) or of the bottom mattress (10) which has the motorized adjustment device (4, 4').
4. Sleep system according to one of Claims 1 through 3, characterized in that a foldable or separable area of the top mattress (9) or of the bottom mattress (10) which has the motorized adjustment device (4, 4') is completely designed as an area (3) without a motorized adjustment device (4, 4').
5. Sleep system according to one of Claims 1 through 4, characterized in that the motorized adjustment device (4, 4') has at least two adjustable segments (2, 2') which are directly connected to one another.
6. Sleep system according to one of Claims 1 through 5, characterized in that the motorized adjustment device (4, 4') is integrated into the top mattress (9) or the bottom mattress (10) which has the motorized adjustment device (4, 4'), wherein
   the motorized adjustment device (4, 4') is provided solely in lateral areas (15, 15') of the top mattress (9) or of the bottom mattress (10) which has the motorized adjustment device (4, 4').
7. Sleep system according to one of Claims 1 through 6, characterized in that the bottom mattress (10) has the motorized adjustment device (4, 4').
8. Sleep system according to Claim 7, characterized in that the bottom mattress (10) includes a base plate (12), wherein
   the base plate (12) is divided into multiple segments (13, 13', 13") which are articulatedly connected to one another, wherein
   the segments (13, 13', 13") are articulatedly connected to one another by means of cloth hinges (7, 7'), wherein
   the segments (13, 13', 13") of the base plate (12) are solid and rectangular, and except for air holes have no openings or recesses.
9. Sleep system according to Claim 8, characterized in that the motorized adjustment device (4, 4') is situated completely over the base plate (12), wherein
   the bottom mattress (10) includes a layer (7a) made of foam which is provided over the base plate (12), wherein
   the layer (7a) made of foam is divided into multiple segments (8a, 8a', 8a"), wherein
   the height of the layer (7a) made of foam at least approximately corresponds to the height of the motorized adjustment device (4, 4'), wherein
   the layer (7a) made of foam has at least one recess (18, 18') which is complementary to the dimensions of the motorized adjustment device (4, 4').
10. Sleep system according to one of Claims 7 through 9, characterized in that the bottom mattress (10) includes a cover (14) which encloses the remaining elements (12, 7a, 4, 4') of the bottom mattress (10).
11. Sleep system according to one of Claims 7 through 10, characterized in that a conventional top mattress (16) is situated on the bottom mattress (10), wherein
    the bottom mattress (10) is at least partially connected to the conventional top mattress (16), wherein
    the bottom mattress (10) is not connected to the conventional top mattress (16) in the adjustment area (1), wherein
    the conventional top mattress (16) includes a conventional top roll mattress (17).
12. Sleep system according to one of Claims 1 through 6, characterized in that the top mattress (9) has the motorized adjustment device (4, 4').
13. Top mattress (9) having the features according to one of the preceding claims.
14. Bottom mattress (10) having the features according to one of the preceding claims.

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